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Chairman:ZHOU Guangzhao (Zhou Guang Zhao) Vice-Chairmen:BAI Yilong DING Naigang LIANG Dongcai SUN Shu WU Zuze XU Guangxian (Hsu,Kwang-Hsien) YAN Luguang YANG Fuqing YANG Le (Yang,Lo) ZHU Zuoyan Editor in Chief:YANG Le (Yang,Lo) Members: CHANG Kung-Ching GU Chaohao SHU Chi-Wang WU Wentsun ZHANG Shouwu CHEN Zhiming JIANG Boju TIAN Gang XI Nanhua ZHANG Weiping CHENG Chongqing LI Jianshu WANG Qihua XIA Zhihong ZHOU Xiangyu DU Dingzhu LIN Fanghua WANG Shicheng YAU Shing-Tung FENG Keqin LIU Zhangju WANG Yuan YE Xiangdong FENG Qi MA Zhiming WANG Yuefei YUAN Yaxiang GE Liminq SHI Zhongci WANG Zikun ZHANG Jiping Ownership by Science in China Press;Copyright(?)2007 by Science in China Press,Beijing,China and Springer-Verlag,Heidelberg,Germany Submission of a manuscript implies:that the work described has not been published before (except in the